Cycloplegic refractions at 6 months, 3 years, and 6 years of age as related to status of retinopathy of prematurity (ROP). Spherical equivalent (mean (SD))
| Group R-0 (21 eyes) | p Value (t test) | Group R-1 (75 eyes) | p Value (t test) | Group R-2 (29 eyes) | Total (125 eyes) | |
| 6 Months | 0.22 (2.69) | 0.000 | −2.37 (3.65) | 0.006 | −5.16 (4.64) | −2.58 (4.11) |
| 3 Years | 0.11 (2.21) | 0.000 | −3.55 (4.47) | 0.160 | −5.13 (5.26) | −3.30 (4.67) |
| 6 Years | 0.27 (1.46) | 0.000 | −3.54 (4.37) | 0.510 | −4.19 (4.50) | −3.05 (4.32) |
↵p Value = 0.000 (paired t test).
Group R-0=no ROP; group R-1=no cicatricial ROP with a history of ROP, regardless of treatment; group R-2=cicatricial ROP, grade II.